Dear Acee, Chris and LSR WG, In the Post Multi-Chassis era, it is more and more common to consider CLOS design for core router (aka De-segregated router). Unlike data center, it requires to run LSR in the “fabric” and dramatically increase the numbers of LSR speakers in the core network. So, the “Fabric” abstraction described in these drafts are important for deployment. We support the WG to work on them.
Best regards, Yiu On January 27, 2020 at 1:27:13 PM, Acee Lindem (acee) ([email protected]<mailto:[email protected]>) wrote: Speaking as WG Co-chair: At IETF 107, we had a protracted discussion of several drafts having goal of reducing the amount of link-state information that must be flooded into the level-2 area. We have two drafts that do this essentially via abstraction of the level-1 areas. These are: https://www.ietf.org/id/draft-li-lsr-isis-area-proxy-01.txt https://www.ietf.org/id/draft-chen-isis-ttz-07.txt There are various reasons why these drafts can’t consolidated involving both IPR and government restrictions. Refer to https://datatracker.ietf.org/meeting/106/materials/minutes-106-lsr-00 for the complete discussion. We have another draft that also reduces the amount of link-state information each IS-IS router must maintain but using IS-IS reflectors. This is slightly different but also avoids leaking all the level-1 area link-state to the level-2 area. https://www.ietf.org/id/draft-przygienda-lsr-flood-reflection-01.txt Given the amount of overlap and the conflicts amongst these drafts, the chairs/Ads are now asking whether there is a really a strong requirement to advance one or more of these documents. Especially given that we are already moving forward with both IS-IS/OSPF flooding reductions and the Hierarchal IS-IS work. Additionally, we anticipate we’ll reach an impasse in consolidating these drafts. We’d really like to hear from the operators that would deploy these mechanisms. Thanks, Acee and Chris
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